Luxman L-507uXII Integrated Amplifier



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The L-507uXII features the New LECUA 1000 attenuator and a discretely configured buffer circuit as well as the Version 4.0 ODNF (Only Distortion Negative Feedback) original feedback circuit to achieve spatial expression, overwhelming power and clarity that is comparable to a separate amplifier.

The new LECUA1000 (Luxman Electronically Controlled Ultimate Attenuator) is the most important part of the pre-amplifier section and handles volume adjustment of sound signals at micro levels. A computerized attenuator, the LECUA1000 is an integral part of the amplifier circuit and performs in the same way as the high-end C-900u LUXMAN control amplifier. A direct connection between the attenuator circuit and amplification circuit is made to minimize the signal transmission route and improve efficiency. This type of design is insensitive to external vibration, eliminates any change in sound quality depending on the position and durable so that it will not decline with the passage of time.

ODNF Version 4.0 innovative amplification feedback circuit

LUXMAN’s original ODNF (Only Distortion Negative Feedback) amplification feedback circuit features a fast-primary slew rate and an ultra-wide bandwidth that is achieved through the feedback of distortion components only from the amplification output circuit. This results in a dramatic enhancement of accuracy in distortion detection, lower impedance and a higher S/N ratio due to a parallel first stage and Darlington connected second stage of the amplification circuit, as well as a 3-parallel first stage error detection circuit. This type of circuit can achieve high power ratings that are comparable to a separate amplifier and has the force to drive various speaker systems to deliver high grade sound reproduction.

Enhanced high capacity power supply

The highly stable power supply of the L-507uXll consists of a large capacity EI-core type power transformer and 4 pieces of customized 10,000 μF capacitor blocks. This ensures an instantaneous, constant and stable current that will deliver sound dynamism.

Discrete buffer circuit

The L-507uXII features a discrete, embedded buffer circuit mounted on the output stage of the pre-amplifier circuit that is equivalent to the type used in the high-end C-900u. This helps to protect the purity of the audio signal while enhancing the drive force of the power amplifier unit.

Low impedance transmission

Large-capacity, low resistance speaker relays are connected in parallel to enable lossless transmission for the powerful driving force that is generated by the large-scale output circuit. The damping factor has been improved from 205 to 260 by directly connecting to the speaker terminals, enabling a dynamic sound expression.

Original technologies prioritize sound quality

To realize a smooth, stress free signal transmission LUXMAN use an original Beeline construction that is a non-angled wiring pattern to allow the signal transmission to take the shortest optimal route. OFC wires are used in the internal wiring to achieve a natural signal transmission due to the spiral wrap shielding on each core and non-plating process on the core wire.

An abundance of user-friendly functions

The L-507uXII is equipped with a high-quality phono amplifier that is compatible with MM/MC cartridges. This model offers all the functions that a high quality integrated amplifier should offer such as bass/treble tone control, LR balance adjustment using LECUA, pre/power separation function, volume function and headphone output.

New customized gradation cast iron Insulator

Gradation cast iron legs that are used for the LUXMAN 900 series separate amplifier are fitted to eliminate resonance for the L-507uXII, taking thorough countermeasures against vibration. The solid loopless chassis with horough grounding adds to the structural stability and therefore sound quality.

Specifications
Rated output 110W + 110W (8Ω),
210W + 210W (4Ω)
Input sensitivity/input impedance PHONO (MM): 2.5mV/47kΩ
PHONO (MC): 0.3mV/100Ω
LINE: 180mV/47kΩ
BAL.LINE: 180mV/55kΩ
MAIN-IN: 1.05V/47kΩ
Output voltage REC OUT: 180mV, PRE-OUT: 1V
Frequency response PHONO: 20Hz to 20kHz (±0.5dB)
LINE: 20Hz to 100kHz (within -3dB)
Total harmonic distortion 0.007% or less (8Ω, 1kHz)
0.08% or less (8Ω, 20Hz to 20kHz)
S/N ratio (IHF-A) PHONO (MM): 91dB or more
PHONO (MC): 75dB or more
LINE: 105dB or more
Volume adjustment New LECUA1000
Amplification circuit ODNF 4.0
Output configuration Bipolar 3-parallel push-pull
Damping factor 260
Max. amount of tone control BASS: ±8dB at 100Hz
TREBLE: ±8dB at 10kHz
Power supply 230V~(50Hz) / 115V~(60Hz)
Power consumption 350W
86W (under no signal), 0.4W (at standby)
External dimensions 440(W) x 178(H) x 454(D) mm
front side knob of 20mm and rear side terminal
of 27mm included in depth
Net weight 25.0kg (main unit)
Accessories Remote control (RA-17A)
Power cable
Speaker terminal Supported Y-lug terminal dimension Width of part a: 15mm or less
Width of part b: 8mm or more

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